Adjustable sectional metallic form for concrete head-walls for culvert-pipes.



M. F. CRAHAN. ADJUSTABLE SECTIONAL METALLIC FORM FOR CONCRETE HEAD WALLS FOR CULVERT PIPES.

APPLICATION .FILED AUG'ZL 91'5- 1,217.571. Patented Feb. 27, 1917;,

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M. F. CRAHAN. 4 ADJUSTABLE SECTIONAL METALLIC FORM FOR CONCRETE HEAD WALLS FOR CULVERT PIPES.

APPLICATION FILED AUG,21' 1915.

v Patented Feb. 211917.

2 SHEETS-SHEET 2.

MICHAEL F. CRAI-IAN, OF IRVINGTON, KENTUCKY.

ADJUSTABLE SECTIONAL METALLIC FORM FOR CONCRETE HEAD-WALLS FOR, CIJ'LVERT- PIPES.

To all whom it may concern:

Be it known that 1, MICHAEL F. CRAHAN, a citizen of the United States, residing at Irvington, in the county of Breckenridge and State of Kentucky, have invented certain new and useful Improvements in Adjustable Sectional Metallic Forms for Concrete Head-Walls for Culvert-Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to an adjustable sectional metallic form for concrete head walls for various kinds of pipe culverts.

The object of the present invention is to improve the construction of forms for concrete head walls for pipe culverts and to provide a simple, practical and comparatively inexpensive metallic form composed of adjustable sections and adapted for molding the concrete head wall for various kinds of pipe culverts, such as cast pipes, corrugated iron pipes, steel pipes and terra cotta or clay pipes and capable of being easily and quickly set u for use by a common laborer without the assistance of a carpenter or other skilled mechanic and of being easily and quickly taken down and readily transferred from one culvert pipe to another.

.A further object of the invention is to provide a concrete form of this character which will possess great strength and durability and outlast a large number of the wooden forms ordinarily employed for this purpose and requiring a carpenter to put them up and take them down.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claim hereto appended, it being understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the-advan-' tages of the invention.

In the drawing Figure 1 is a front elevation of a head wall form constructed in accordance with this invention,

Fig. 2 is a plan view of the same,

Specification of Letters Patent.

Patented Feb. 27, ism.

' Application filed August 27, 1915. Serial N 0. 47,663.

Fig. 3'is a transverse sectional view of the head wall form,

Fig. 4: is a perspective view of one of the side sections,

Fig. 5 is a similar view of one of the outer boards,

Fig. 6 isa detail perspective view of one of the angle sections for forming the extension co mg,

Fig. is a detail perspective view of one of the packing sheets.

Like numerals of reference designate corresponding parts in the several figures of the drawings. I

In the accompanying drawingsin which is illustrated the preferred embodiment of the invention, the sectional metallic form comprises in its construction a plurality of front sections 1 and side sections 2 con.

structed of suitable sheet metal either corrugated or plain and detachably connected together to enable them to be readily assembled and separated. The front sections are provided with horizontal flanges 3 projecting outwardly and extending longitudinally of the sections throughout the entire length of the same and any number of the front sections may of course be employed to provide. a wall of the desired height. The side sections are provided with upper and lower longitudinal flanges 4: and they have front vertical flanges 5 having perforations 6 adapted to register with perforations 7 of the front section to enable a wall of the desired length to be formed. The perforations 7 which may be of any desired number are arranged in vertical series at suitable intervals. Two sections are shown in the accompanying drawings at each of the side walls and front wall of the form but any number of sections may of course be employed, and the connected horizontal flanges of the front and side sections are reinforced by upper and lower flange strips or plates and gasket strips 9 are interposed between the flanges. The bolts 10 which pierce the flanges, the strips or' plates and the gasket strips may be of any desired construction and the said gasket strips are designed to be constructed of rubber or any other suitable material to form a tight joint or connection.

The form is also provided with rear sections 11 constructed of sheet metal and provided at their outer ends with vertical flanges 12 which are secured to the rear ends of the vertical side section by bolts 13. The rear sections 11 are cut away at their inner. portions at 14 to form curved upper edges to fit the culvert pipes 15 as clearly illustrated in Fig. 3 of the drawings.

The culvert pipe is supported upon an underground apron wall 16 in the usual manner and the rear sections fit against the opposite sides of the lower portion of the culvert pipe. The pipe 15 extends through the rear section and lies abutted against the fork section of the form. The rear sections of various sizes may of course be employed to fit culvert pipes of different diameters and the upper portion of the rear end of the form is closed by packing strips or sheets 17 trimmed to lit the culvert pipe and designed to be supported in position by the earth around the culvert pipe or any other suitable means.

When the head wall is raised to the de sired height a projecting coping is formed by approximately L-shaped coping sections 18 composed of horizontal and vertical wings or flanges, the horizontal wings or flanges being secured by bolts 19 to the top flanges of the upper section at the front and side .of the form, the vertical flan es extending upwardly from the outer portions of the horizontal flanges.

The sides of the form are stiffened and braced by exterior board 20 fitted between the upper and lower flanges of the upper and lower sections of the side walls and provided with recesses 21 having upper horizontal walls or shoulders and inclinedrear walls and adapted to receive the upper ends of braces 22 consisting of inclined pieces arranged as shown in Fig. 3 ofthe drawings.

The bracing means are readily applied to the walls of the form and may be quickly removed therefrom and while bracing means are shown only at the said sections of the side walls they may be arranged also at the front wall and any other point.

From the foregoing description taken in connection with the accompanying drawings, it will be noted that this type of mold is especially adapted for molding concrete head walls to culverts which are of the type that employ a pipe passing under a roadway or the like and having its ends received within concrete heads located upon each side of the roadway or the like.

What is claimed is A device of the character set forth comprising a plurality of front and side sections, horizontal flanges formed on the front sections and extending outwardly therefrom, longitudinal flanges formed on the upper and lower edges of the side sections, means for securing the flanges of the side and front sections together, vertical flange. formed on the side sections and bolted to the front sections, a rear section, flanges formed on the outer ends of the rear section and bolted to the side sections, said rear section having its upper edge cut away to receive one end of a pipe, and packing strips carried by the side sections and disposed above the upper edge of the rear section to engage a portion of the pipe to retain it in the cut away portion of the rear section.

In testimony whereof I affix my signature in presence of two witnesses.

MICHAEL F. GRAHAN.

lVitnesses J. C. PAYNE, G. J CARNEGIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

